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upstage · Efficient

Solar Mini 4 Thinking

Added Sep 23, 2026

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Use in the app

Solar Mini 4 with reasoning enabled for agentic tasks and harder analysis across a 524K-token context window.

  • Reasoning
  • Tools
  • Structured output
Input
Text
Output
Text
Reasoning effort
none · low · medium · high
Discovery tier
Efficient

Pricing

USD per 1M tokens
Input
$0.05
Output
$0.20
Cache read
$0.005

Reference prices as published by the model provider. API example

Specifications

Context window
524.3K
Max output
131.1K
Average output (7 days)
2.8K tokens
Longer than 95% of 465 models

Side by side

Solar Mini 4 Thinking compared

Specifications, prices, speed and benchmark scores next to each other. Benchmarks below show every compared model too.

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Solar Mini 4 ThinkingupstageThis modelSolar Mini 4upstageRemove
Providerupstageupstage
Discovery tierEfficientEfficient
AddedSep 23, 2026Sep 23, 2026
Limits
Context window524.29K524.29K
Max output131.07K131.07K
Average output2.8K tokens561 tokens
Pricing, USD per 1M tokens
Input$0.05$0.05
Output$0.20$0.20
Cache read$0.005$0.005
Performance
Throughput—90.6 tok/s
Time to first token—2.2 s
Request success (24h)—89.1%
Benchmark indexes
Intelligence Index—24.1
Capabilities
ReasoningYesNo
ToolsYesYes
Structured outputYesYes
Reasoning effortnone, low, medium, high—

Public evaluations

Benchmarks

Independent evaluation results, with how each score ranks among the models in the Noumen catalog.

  • Solar Mini 4 Thinking
  • Solar Mini 4

Intelligence Index

  • Solar Mini 4 Thinking—
  • Solar Mini 424.1
3.8Catalog models by score55.1

Agentic work

  • AutomationBench-AA

    Workflow automation, penalized for guardrail violations

    • Solar Mini 4 Thinking: —
    • Solar Mini 4: 22.3%

  • AutomationBench-AA tasks completed

    Workflows finished end to end without a guardrail violation

    • Solar Mini 4 Thinking: —
    • Solar Mini 4: 2.4%

  • AA-Briefcasev1.1

    Agentic knowledge work, rated head to head

    • Solar Mini 4 Thinking: —
    • Solar Mini 4: 867 Elo

  • GDPval-AAv2.1

    Economically valuable occupational tasks, rated head to head

    • Solar Mini 4 Thinking: —
    • Solar Mini 4: 1,085 Elo

Document reasoning

  • GDP.pdf

    Professional reasoning over PDF documents, all-pass rate

    • Solar Mini 4 Thinking: —
    • Solar Mini 4: 5.0%

  • AA-LCRv1.1

    Reasoning across long documents

    • Solar Mini 4 Thinking: —
    • Solar Mini 4: 83.3%

  • MLCR-AA

    Long-context reasoning over medical records

    • Solar Mini 4 Thinking: —
    • Solar Mini 4: 6.7%

Reasoning and knowledge

  • Humanity’s Last Exam

    Expert-level questions across academic fields

    • Solar Mini 4 Thinking: —
    • Solar Mini 4: 25.8%

Coding

  • Terminal-Benchv4.0

    Practical software engineering in a terminal

    • Solar Mini 4 Thinking: —
    • Solar Mini 4: 1.0%

  • SciCode

    Scientific computing in Python

    • Solar Mini 4 Thinking: —
    • Solar Mini 4: 47.6%

Legacy evaluations

  • AA-LCR (unversioned)

    Long-context reasoning, earlier grading

    • Solar Mini 4 Thinking: —
    • Solar Mini 4: 83.3%

Scores from Artificial Analysis, updated Oct 26, 2026. Artificial Analysis

Developers

Use it through the API

Noumen’s API is OpenAI-compatible: any Chat Completions client works with a base URL and a key.

Read the quickstart
curl https://www.noumen.xyz/api/v1/chat/completions \
  -H "Authorization: Bearer $NOUMEN_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "upstage/solar-mini4:thinking",
    "reasoning_effort": "medium",
    "messages": [{ "role": "user", "content": "Explain this stack trace." }]
  }'
import os
from openai import OpenAI

client = OpenAI(base_url="https://www.noumen.xyz/api/v1", api_key=os.environ["NOUMEN_API_KEY"])
reply = client.chat.completions.create(
    model="upstage/solar-mini4:thinking",
    messages=[{"role": "user", "content": "Explain this stack trace."}],
)
print(reply.choices[0].message.content)

upstage

Other upstage models, starting with the same family.